Fuels and Combustion MCQs

Question 1

The calorific value of L.D. converter gas is about __________ kcal/Nm 3 .

Accepted Answer

1800

Answer

800

Answer

4500

Answer

10000

Question 2

Calorific value of coke oven gas is around __________ kcal/Nm 3 .

Accepted Answer

4200

Answer

900

Answer

7500

Answer

2000

Question 3

Calorific value of of blast furnace gas is around __________ kcal/Nm 3 .

Accepted Answer

850

Answer

1800

Answer

4200

Answer

6500

Question 4

Largest constituent of blast furnace gas is

Accepted Answer

N 2

Answer

CO

Answer

CO 2

Answer

H 2

Question 5

About __________ Nm 3 of air will be required for the complete combustion of 2 Nm 3 of CO.

Accepted Answer

5

Answer

2

Answer

3

Answer

1

Question 6

Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of

Accepted Answer

MgO & Na 2 CO 3

Answer

MgSO 4 & BaCl 2

Answer

BaSO 4 & NaCl

Answer

MgCO 3 & NaCl

Question 7

Desirable "Micum Index" values of metal-lurical coke are

Accepted Answer

M 40 > 78% and M 10 < 10%

Answer

M 40 > 4% and M 10 < 80%

Answer

M 40 > 10% and M 10 < 78%

Answer

M 40 > 98% and M 10 < 2%

Question 8

Bulk density of pulverised coal may be about __________ kg/m 3 .

Accepted Answer

500

Answer

100

Answer

1000

Answer

1500

Question 9

Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around __________ Nm 3 .

Accepted Answer

300

Answer

30

Answer

3,000

Answer

30,000